利用山东区域地震数字台网提供的数据，通过三维层析成像方法结合山东地质构造实际情况，对山东区域进行联合走时反演地壳速度结构，获得该区分辨率较高的三维速度结构图像。结果表明：不同深度上的速度分布反映出山东地区深部构造的某些重要信息，为进一步研究该区的活动构造及地震参数计算提供科学依据。在地壳速度结构与中强地震活动的关系上，再次显示出中强震多发生在速度结构高速单元与低速单元的过渡带附近，说明中强震的孕育与震源区周围介质的不均匀性有关。

In this paper using inversion technique about combined travel—time of seismic waves on the data recorded by Shandong regional seismic station network, and the actual situation of geological structures in Shandong ,tomography research in the area is discussed． The work has shown that： Different depths of the velocity distribution reflects the deep structure in Shandong, some important information for further research in the area of active tectonics and earthquake parameters to provide a scientific basis for calculation. Strength of crustal structure and the relationship between seismic activity, again showing the strong earthquake occurred in the velocity structure of high-speed multi-unit and unit of the transition zone near the low, indicating the strong earthquake source region of birth and the uneven nature of the surrounding  medium .